Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
A woman's sense of smell is most sensitive during ovulation.
34
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Perspiration is odorless; it is the bacteria on the skin that creates an odor.
39
One quarter of the human brain is used to control the eyes.
43
Flu shots only work about 70% of the time.
18
The right lung takes in more air than the left.
30
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46